$ git clone -n https://src.fedoraproject.org/rpms/libXScrnSaver.git /var/lib/mock/f45-build-15764-479/root/chroot_tmpdir/scmroot/libXScrnSaver
Cloning into '/var/lib/mock/f45-build-15764-479/root/chroot_tmpdir/scmroot/libXScrnSaver'...
$ git fetch origin e24c25645bc60bad781a117ed06b2c0f00c01e6a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libXScrnSaver
 * [new ref]         e24c25645bc60bad781a117ed06b2c0f00c01e6a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e24c256 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild